Like millions of Americans, I’ve been riveted by “Monsters: The Lyle and Erik Menendez Story,” the hit Netflix series about the two Beverly Hills brothers who murdered their parents in 1989. Some of showrunner Ryan Murphy’s work is too campy for my tastes, but this time around he nailed it, helped by a superb cast anchored by Javier Bardem (Jose Menendez, an entertainment executive) and Chloë Sevigny (his aimless wife, Kitty).